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<br />00243~ <br /> <br />Durango Pumoing Plant - Stage 1 <br /> <br />1. <br /> <br />Where foot traffic or other construction activity is necessary on concrete being <br />cured by curing compound or polyethylene film, protect the curing membrane by <br />covering with sand or earth not less than 1 inch thick, with plywood, or by other <br />effective means approved by the Contracting Officer. <br /> <br />Do not place protective covering on curing compound until the compound is dry. <br />Remove the protective coverings before final acceptance of the work. <br /> <br />~ <br /> <br />2. <br /> <br />3.05. STRUCTURAL DEVIATIONS AND SURFACE TOLERANCES <br /> <br />A. Structural deviations are defined as allowable variations from specified lines, grades, and <br />dimensions. <br /> <br />B. Surface tolerances are defined as maximum allowable magnitude of surface irregularities. <br /> <br />C. Specified structural deviations and surface tolerances are consistent with modem <br />construction practice and governed by effect that permissible variations may have upon a <br />structure. Contracting Officer reserves the right to diminish specified structural <br />deviations and surface tolerances where such variations impair structural action, <br />operational function, or architectural appearance of a structure or portion of structure. <br /> <br />D. Construct concrete within stated variations even though more than one may be specified. <br /> <br />I. Specified variation for one element of a structure wi)) not apply when it will <br />permit another element of same structure to exceed its allowable variation. <br /> <br />2. Where variations are not specified or shown on drawings for a particular <br />structure, variations will be those specified for similar work. As an exception to <br />clause entitled "Order of Precedence - Construction - Reclamation," specific <br />tolerances shown on drawings in connection with any dimension will govern. <br /> <br />E. Structural Deviations: <br /> <br />I. Check variations from specified lines, grades, and dimensions in hardened <br />concrete to determine that structures are within tolerances specified in Table <br />03300A - Deviations from Specified Lines, Grades, and Dimensions. <br /> <br />2. Variation is distance between actual position of structure or any element of <br />structure and specified position in plan for structure or particular element. <br /> <br />a. Plus or minus variations, shown as (t), indicate a permitted actual position <br />up or down and in or out from specified position in plan. <br /> <br />b. Variations not designated as (+) or (-) indicate maximum deviation <br />permitted between designated successive points on completed element of <br />construction. <br /> <br />3. Specified position in plan is defined as lines, grades, and dimensions described in <br />these specifications, shown on drawings, or prescribed by Contracting Officer. <br /> <br />Cast-in-Place Concrete <br />03300 - 35 <br />